(19)

(11)

EP 1 623 233 A1

(12)

(43) Date of publication: 08.02.2006 Bulletin 2006/06 (21) Application number: 04731203.8 (22) Date of filing: 05.05.2004

(51) International Patent Classification (IPC):  G01N 33/68(1980.01) G01N 33/543(1985.01) (86) International application number: PCT/GB2004/001945 (87) International publication number: WO 2004/099785 (18.11.2004 Gazette 2004/47)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 08.05.2003 GB 0310522 (71) Applicant: Yorktest Laboratories Limited York, YO19 5US (GB)	(72) Inventor: COUSINS, Peter, David, George Osbaldwick, York YO19 5US (GB) (74) Representative: Harrison Goddard Foote  31 St Saviourgate York Y01 8NQ York Y01 8NQ (GB)